<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div>
    {{info}}
</div>
<script src="vue.js"></script>
<script>
    let v=new Vue({
        el:"div",
        data:{
            info:"Hello Vue!"
        }
    })
    setTimeout(function () {
        v.info="值改变了!";
    },3000)
</script>
</body>
</html>